Gravity is considered to be an inherent part of everybody because everything that can be seen in this world is connected to the center which is where gravity is supposed to come from. People are being pulled towards the center of the earth. There are also times when some people and items will be pulled more by gravity usually when things are very heavy.
When you throw something to the air, you can expect that it will fall down eventually. The rate that it is going to fall down will depend on the weight of the items. There was a time when people have assumed that gravity can be found within but because of further studies, it became connected to the earth’s center.
What is inherent in every body is that it is on Earth, which has force attracting every body to its centre. This is gravitational force. This, and the acceleration generated by this force is known as the acceleration due to gravity.
It is denoted by the letter 'g'. In simple terms, imagine placing any object in the air with nothing like a table or support underneath it. It will fall to the ground. This is gravitational force.